221232201013 has 2 divisors, whose sum is σ = 221232201014. Its totient is φ = 221232201012.

The previous prime is 221232200933. The next prime is 221232201017. The reversal of 221232201013 is 310102232122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221132241009 + 99960004 = 470247^2 + 9998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221232201013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221232201017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110616100506 + 110616100507.

It is an arithmetic number, because the mean of its divisors is an integer number (110616100507).

Almost surely, 2^221232201013 is an apocalyptic number.

It is an amenable number.

221232201013 is a deficient number, since it is larger than the sum of its proper divisors (1).

221232201013 is an equidigital number, since it uses as much as digits as its factorization.

221232201013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 221232201013 its reverse (310102232122), we get a palindrome (531334433135).

The spelling of 221232201013 in words is "two hundred twenty-one billion, two hundred thirty-two million, two hundred one thousand, thirteen".